Gravity Probe B

Testing Einstein's Universe

WEEKLY HIGHLIGHTS FOR WEEK ENDING 20 JUNE 2003:

SUCCESSFULLY COMPLETED SIMULATION #5
The GP-B team successfully completed simulation #5 (performed on the space vehicle). The full team ran through the go/no-go, launch, deployment, space
vehicle activation, and science. Staffing, day-in-the-life planning, personnel communications, and the anomaly resolution process were all worked as part of
this activity. This simulation demonstrated that the team has the capability to operate the space vehicle on-orbit.

Photo: The GP-B spacecraft.

SPACE VEHICLE PROGRESS
The space vehicle test team performed guard tank thrust nullifier fit and alignment operations. The team also modified the timing cable which
connects the IU unit to the B side star tracker. The modification maintains full system redundancy.